Larissa Nadia Larsen, M.D.
Dermatology Physician · Ventura, CA
Larissa Nadia Larsen, M.D. is a dermatology physician with a practice address in Ventura, California, and NPI 1063733426, issued on Jun 18, 2010. Check the license (California A118359, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Larissa Nadia Larsen
- Credential
- M.D.
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- A118359 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6633 Telephone RD Ste 100, Ventura, CA 93003
- Phone
- (310) 644-9121
- Enumerated
- Jun 18, 2010
- Record last updated
- Jan 4, 2024
- Medicare enrollment
- Enrolled (PECOS I20140805002621); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 6633 Telephone RD Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Ahern, MDFamily Medicine Physician1508359423
- Travis Welsh, MDRheumatology Physician1821591611
- Nathaniel Yuan, DOSleep Medicine (Internal Medicine) Physician1659875201
Verify Larissa Nadia Larsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A118359Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
About as many Medicare Part D claims as the average dermatology physician in 2024
795 Medicare Part D claims for 350 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Betamethasone Dipropionate148 claims
- Triamcinolone Acetonide117 claims
- Ketoconazole79 claims
- Fluorouracil72 claims
- Clobetasol Propionate38 claims
- Metronidazole38 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 0 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $24.93
1 payment: food and beverage; the largest payer was Abbvie Inc. The 10,250 providers of this specialty with any payment received $8,544.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- The Regents OF The University OF CaliforniaThousand Oaks, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
Other dermatology physician records in California
- Sam Abaza, M.D.Diamond Bar, CA1831148501
- Farah Abdulla, MDDuarte, CA1093934390
- Robert Abergel, M.D.Santa Monica, CA1841565843
- Karen Abisogun, MDLos Angeles, CA1124474515
- Glynis Ablon, M.D.Manhattan Beach, CA1144292889
- Arthur Abrams, MDMountain View, CA1518093178
- Payam Abrishami, MDAgoura Hills, CA1447288147
- Aseel Abu-NasserRedding, CA1609641711
- Rachel Abuav, M.D.Beverly Hills, CA1356481733
- Boya Abudu, MD, MPHSacramento, CA1336608637
Common questions
What is Larissa Nadia Larsen, M.D.'s NPI number?
Larissa Nadia Larsen, M.D.'s National Provider Identifier (NPI) is 1063733426, issued on Jun 18, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Larissa Nadia Larsen, M.D. located?
The NPPES record lists a practice address at 6633 Telephone RD Ste 100, Ventura, CA, 93003. Phone: (310) 644-9121. Providers update this record themselves, so call before visiting.
How can I verify Larissa Nadia Larsen, M.D.'s license?
NPPES lists California license number A118359, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Larissa Nadia Larsen, M.D. prescribe under Medicare Part D?
In 2024, Larissa Nadia Larsen, M.D. had 795 Medicare Part D claims for 350 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
What is Larissa Nadia Larsen, M.D.'s MIPS final score?
The 2023 MIPS final score is 0 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.